1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
This code is derived from jgit (http://eclipse.org/jgit).
Copyright owners are documented in jgit's IP log.
This program and the accompanying materials are made available
under the terms of the Eclipse Distribution License v1.0 which
accompanies this distribution, is reproduced below, and is
available at http://www.eclipse.org/org/documents/edl-v10.php
All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
- Neither the name of the Eclipse Foundation, Inc. nor the
names of its contributors may be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using NGit.Diff;
using Sharpen;
namespace NGit.Diff
{
[NUnit.Framework.TestFixture]
public class HistogramDiffTest : AbstractDiffTestCase
{
protected internal override DiffAlgorithm Algorithm()
{
HistogramDiff hd = new HistogramDiff();
hd.SetFallbackAlgorithm(null);
return hd;
}
[NUnit.Framework.Test]
public virtual void TestEdit_NoUniqueMiddleSide_FlipBlocks()
{
EditList r = Diff(T("aRRSSz"), T("aSSRRz"));
NUnit.Framework.Assert.AreEqual(2, r.Count);
NUnit.Framework.Assert.AreEqual(new Edit(1, 3, 1, 1), r[0]);
// DELETE "RR"
NUnit.Framework.Assert.AreEqual(new Edit(5, 5, 3, 5), r[1]);
}
// INSERT "RR
[NUnit.Framework.Test]
public virtual void TestEdit_NoUniqueMiddleSide_Insert2()
{
EditList r = Diff(T("aRSz"), T("aRRSSz"));
NUnit.Framework.Assert.AreEqual(1, r.Count);
NUnit.Framework.Assert.AreEqual(new Edit(2, 2, 2, 4), r[0]);
}
[NUnit.Framework.Test]
public virtual void TestEdit_NoUniqueMiddleSide_FlipAndExpand()
{
EditList r = Diff(T("aRSz"), T("aSSRRz"));
NUnit.Framework.Assert.AreEqual(2, r.Count);
NUnit.Framework.Assert.AreEqual(new Edit(1, 2, 1, 1), r[0]);
// DELETE "R"
NUnit.Framework.Assert.AreEqual(new Edit(3, 3, 2, 5), r[1]);
}
// INSERT "SRR"
[NUnit.Framework.Test]
public virtual void TestEdit_LcsContainsUnique()
{
EditList r = Diff(T("nqnjrnjsnm"), T("AnqnjrnjsnjTnmZ"));
NUnit.Framework.Assert.AreEqual(new Edit(0, 0, 0, 1), r[0]);
// INSERT "A";
NUnit.Framework.Assert.AreEqual(new Edit(9, 9, 10, 13), r[1]);
// INSERT "jTn";
NUnit.Framework.Assert.AreEqual(new Edit(10, 10, 14, 15), r[2]);
// INSERT "Z";
NUnit.Framework.Assert.AreEqual(3, r.Count);
}
[NUnit.Framework.Test]
public virtual void TestExceedsChainLength_DuringScanOfA()
{
HistogramDiff hd = new HistogramDiff();
hd.SetFallbackAlgorithm(null);
hd.SetMaxChainLength(3);
SequenceComparator<RawText> cmp = new _SequenceComparator_97();
EditList r = hd.Diff(cmp, T("RabS"), T("QabT"));
NUnit.Framework.Assert.AreEqual(1, r.Count);
NUnit.Framework.Assert.AreEqual(new Edit(0, 4, 0, 4), r[0]);
}
private sealed class _SequenceComparator_97 : SequenceComparator<RawText>
{
public _SequenceComparator_97()
{
}
public override bool Equals(RawText a, int ai, RawText b, int bi)
{
return RawTextComparator.DEFAULT.Equals(a, ai, b, bi);
}
public override int Hash(RawText a, int ai)
{
return 1;
}
}
[NUnit.Framework.Test]
public virtual void TestExceedsChainLength_DuringScanOfB()
{
HistogramDiff hd = new HistogramDiff();
hd.SetFallbackAlgorithm(null);
hd.SetMaxChainLength(1);
EditList r = hd.Diff(RawTextComparator.DEFAULT, T("RaaS"), T("QaaT"));
NUnit.Framework.Assert.AreEqual(1, r.Count);
NUnit.Framework.Assert.AreEqual(new Edit(0, 4, 0, 4), r[0]);
}
[NUnit.Framework.Test]
public virtual void TestFallbackToMyersDiff()
{
HistogramDiff hd = new HistogramDiff();
hd.SetMaxChainLength(4);
RawTextComparator cmp = RawTextComparator.DEFAULT;
RawText ac = T("bbbbb");
RawText bc = T("AbCbDbEFbZ");
EditList r;
// Without fallback our results are limited due to collisions.
hd.SetFallbackAlgorithm(null);
r = hd.Diff(cmp, ac, bc);
NUnit.Framework.Assert.AreEqual(1, r.Count);
// Results go up when we add a fallback for the high collision regions.
hd.SetFallbackAlgorithm(MyersDiff<Sequence>.INSTANCE);
r = hd.Diff(cmp, ac, bc);
NUnit.Framework.Assert.AreEqual(5, r.Count);
}
}
}
|
